Integration Manual

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R13 System description Page 26 of 119
commands fails or if the module does not provide a reply to a specific AT command after a time period longer than
the one defined in the SARA-R4/N4 series AT Commands Manual [2].
⚠
⚠⚠
⚠ Forcing a low level on the RESET_N input during SARA-R4/N4 series modules normal operations may lead to an
unrecoverable faulty state!
The RESET_N input pin is directly connected to the Power Management Unit IC, with an integrated pull-up to a 1.8 V
supply domain, in order to perform an abrupt hardware shutdown when asserted. Detailed electrical characteristics with
voltages and timings are described in the SARA-R4/N4 series Data Sheet [1].
18
RESET_N
SARA-R4/ N4
Power Management Unit
Reset
Shut down
1.8V
Figure 12: RESET_N input description